From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: vfp: Remote obsolete fpmx_state field from vfp_hard_struct
Date: Wed, 30 Mar 2011 18:52:36 +0100 [thread overview]
Message-ID: <20110330175236.GB2939@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1301489184-4112-2-git-send-email-dave.martin@linaro.org>
On Wed, Mar 30, 2011 at 01:46:24PM +0100, Dave Martin wrote:
> The fpmx_state field was presumably used in the past, when
> FSTMX/FLDMX were used to save and resture the VFP state.
>
> This was been deprecated since ARMv6, the context switch code
> has been ported to use the double-precision load/store variants
> many years ago, and now it appears that nothing in the kernel
> references this field any more.
Wrong.
.macro VFPFSTMIA, base, tmp
#if __LINUX_ARM_ARCH__ < 6
STC p11, cr0, [\base],#33*4 @ FSTMIAX \base!, {d0-d15}
#else
STC p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d0-d15}
#endif
So, building for pre-ARMv6, it's still used.
next prev parent reply other threads:[~2011-03-30 17:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-30 12:46 [PATCH] ARM: vfp: Remote obsolete fpmx_state field from vfp_hard_struct Dave Martin
2011-03-30 12:46 ` Dave Martin
2011-03-30 17:52 ` Russell King - ARM Linux [this message]
2011-03-31 9:17 ` Dave Martin
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